Front support mechanism for safety ski binding

ABSTRACT

A front support mechanism for safety ski bindings which includes a support structure and lateral support arms at the support structure which are pivotal laterally against a resilient detent effect about pivot axes disposed perpendicularly or approximately perpendicularly to the ski surface; the pivot axes of the lateral support arms are thereby displaced in dependence on the pivot movement by a rolling-off action of the support arms at a rolloff part which is, for example, fixed to the ski.

United States Patent 1191 Sittmann 1451 Oct. 7, 1975 I FRONT SUPPORTMECHANISM FOR 3,734,521 1973 Payrhammer 280/11.35 T

SAFETY SKI B INDI NG FOREIGN PATENTS OR APPLICATIONS [75] Invenm gStuttgart 1,809,889 11/1968 Germany 280/1 1.35 T

ermany [73] Assignee: VereinigteBaubeschlagfabriken PrimaryExaminer-Robert R. Song Gretsch and GmbH, Germany Attorney, Agent, orFirmCraig 8L Antonelli [22] Filed: Nov. 8, 1973 1 1211 Appl. No.:414,108 [571 ABSTRACT A front support mechanism for safety ski bindingsForeign Application Priority Data which includes a support structureand'lateral support N 8 1972 G 22 arms at the support structure whichare pivotal laterermany 22545 ally against a resilient detent effectabout pivot axes disposed perpendicularly or approximatelyperpendicularly to the ski Surface; the pivot axes of the lateral [58]280ml T support arms are thereby displaced in dependence on v 0 care fthe pivot movement by a rolling-off action of the support arms at aroll-off part which is, for example, fixed [56] References Cited to theSki 1 9 UNITED STATES PATENTS I 3 3,685,849 8/1972 Marker 280/1 1.35 TClams 8 Drawlfig Flgures 27 v 7 48 yr Sheet2 0f5 V a QN Q 1 SN ON US.Patent Oct. 7,1975

US. Patent 00:. 7,1975 Sheet 3 of5 3,910,592

U.S. Patent Oct. 7,1975 Sheet4 0f5 3,910,592

US. Patent Oct. 7,1975 SheetS of5 3,910,592

FRONT SUPPORT NIECHANISM FOR SAFETY SKI BINDING The present inventionrelates to a front support mechanism for safety ski bindings having asupport member and lateral support arms which are pivotal laterallyagainst a resilient detent effect at the support member about pivot axesperpendicular or approximately perpendicular to the ski surface.

The present invention is now concerned with the task to enable such aguidance of the lateral support arms with means which are as simple andfrictionless as possible that the support arms carry out a pivotmovement whose pivot radius changes with the stroke or deflectionmovement of the support arms.

Accordingly, the present invention essentially consists in that thepivot axes of the lateral support arms are displaced in dependence onthe pivot movement by a rolling off action of the support arm at aroll-off part, for example, fixed at the ski. Preferably, the displacement takes place in such a manner that the pivot axes are displacedrearwardly in the course of the outward pivot stroke of the support armsand/or that the pivot radii are reduced.

It can be achieved by the present invention that the lateral supportarms, for example, in case of a twisting fall, move initiallyessentially laterally and only after a' certain stroke carry out astronger movement in the forward direction by the displacement of thepivot axis, particularly in such a manner that with small lateralmovements of the front portion of the boot, a release thereof is not yetachieved but instead the boot returns again into the center positionafter the cessation of the laterally airected force and is released bythe lateral support arms only with stronger lateral strokes.

The displacement of the pivot axis can take place continuously orstepwise. In a particularly simple embodiment the support arms and theroll-off part fixed with the ski are in engagement with one another by atoothed connection. In the simplest construction, the toothedarrangement may include two teeth mutually offset in the longitudinaldirection of the ski, especially in such a manner that at first theforward tooth, as viewed in the longitudinal direction of the ski, andafter a certain pivot stroke the rear tooth forms the pivot axis of thelateral support arm.

In a structurally particularly advantageous embodiment, the two lateralsupport arms are supported so as to roll off along an outer wall of thesupport member from the inside thereof. For purposes of securing thelateral support arms against lifting off from the part which is inroll-off contact with the same, the lateral support arms may beadditionally guided, for example, by means of pins or the like in oralong arcuately shaped guide surfaces. The guidance in these additionalguide means can take place with only slight frictional resistancebecause during the pivoting of the lateral support arms the lateralpressure force is absorbed at the roll-off points of the lateral supportarms.

In a spatially compact construction, a coil or helical spring serving asdetent spring is provided on a pin arranged between the lateral supportarms, which pin is carried by a fork guided longitudinally adjustable inslots of the support member for purposes of adjusting the spring stress.The support arms are the reby supported against the spread apart ends ofthe spring which are additionally stressed during the lateral pivotingmovements of the support arms.

These and further objects, features and advantages of the presentinvention will become more apparent from the following description whentaken in connection with the accompanying drawing which shows, forpurposes of illustration only, two embodiments in accordance with thepresent invention, and wherein:

FIG. 1 is a plan view on safety ski binding front support mechanismaccording to the present invention in cross section taken along 11 ofFIG. 2;

FIG. 2 is a cross-sectional view along line 22 of FIG. 1;

FIG. 3 is a cross-sectional view along line 3-3 of FIG. 1;

FIG. 4 is a side elevational view of the front mechanism of a safety skibinding in accordance with the present invention;

FIG. 5 is a partial view on the support mechanism of FIG. 2;

FIG. 6 is a partial plan view on the support mechanism corresponding toFIG. 1, however, with a laterally deflected support arm;

FIG. 7 is a plan view, similar to FIG. 1, on another embodiment of asupport mechanism for a safety ski binding in accordance with thepresent invention; and

FIG. 8 is a cross-sectional view, similar to FIG. 3, and taken alongline 8-8 of FIG. 7.

Referring now to the drawing wherein like reference numerals are usedthroughout the various views to designate like parts, reference numeral10 designates a ski on which is secured in any suitable manner, forexample, by means of screws 11, a support structure generally designatedby reference numeral 12 which is thus fixedly arranged with respect tothe ski. This support member 12 is constructed housing-shaped andincludes a base plate 13, a cover plate 14, lateral walls 15, a forwardend wall 16 and a rear center web 17 connecting the base plate 13 withthe cover plate 14, whereby the center web 17 is delimited on its twosides by two apertures 18.

Corresponding to FIG. 3, guide pins 19 which extend perpendicular to theski surface are riveted into the base plate 13 and into the cover plate14; the lateral support arms generally designated by reference numerals20 and 21 are in engagement with the guide pins 19 by means of curvedslots 22. The support arms 20 and 21 are each constituted by twoplate-shaped parts, and more particularly by a lower plate 20a and 21aand by an upper plate 20b and 21b, respectively, which are connectedinto a unitary structure by upright walls 23. Bearing members 24 areinserted between the plates 20a, 20b and 21a, 21b; the boot sole holders25 engaging over the boot sole 27, are supported adjustably in height atthe bearing members 24 by means of threaded screws or bolts 26.

For the further support of the forward edge of the boot sole 27,indicated in FIG. 1 in dash and dot lines, an adjusting screw 28 isthreadably arranged in the center web 17 of the support structure 12.

The lateral walls 15 of the support member 12 serve as roll-off partsfor the lateral support arms 20 and 21. To that end, they are providedeach with two pairs of slot-like apertures 29 and 30, into which engageor may engage projections or teeth 31 and 32 rounded off in circularshape and provided at the plates 20a, 20b and 21a, 2117, when thelateral support arms 20 and 21 are pivoted outwardly. Teeth 31 and 32are thereby arranged at an arcuately shaped edge 33 which delimit theaforementioned plates approximately in a circular are about a centerpoint of curvature 19a (FIG. la) which coincides approximately with theaxis of the guide pin 19 when the latteris disposed corresponding toFIG. 1 at the inner. end of the arcuate guide slot 22.

Furthermore, abutment pins 34 and 35 arefixedly arranged at the lateralsupport arms 20 and 21 which cooperate witha detent spring generallydesignated by reference numeral 36' and constructed coil or helicalspring. The spring 36 is wound about a pin 37 which is retained by afork 38 and is provided at its upper and at its lower end with flattenedoff portions 39 between the lateral support arms 20 and 21 or the platesthereof so that wedger web-like projections 40 and 41 are formed whichengage into the slots 42 and 43 in the base plate 13 and in the coverplate 14, respectively, and are guided therein. For purposes ofadjusting the pin 37 or the detent spring 36 in the ski longitudinaldirection x x the fork 38 includes a forwardly directed threaded bolt 44whose thread is in engagement with a nut 45 which, in its turn, isrotatably but nondisplaceably supported in the front end wall 16 of thehousing-like support member 12. The upper slot 43 may be provided with ascale 430 (FIG. in order to indicate the adjusted spring stress inconjunction with a pointer 41a at the upper projection 41.

The two ends 46 and 47 of the spring 36 are spread apart toward therear, crossing one another in such a manner that they'abut at theabutment pins 34 and 35 fixedly arranged at the lateral support jaws 20and 21 from the-outside thereof. The spring ends are preferably providedwith curved portions 48 and 49 in order to influence the disengagementof the lateral support arms 20- and 21 in the manner to be describedmore fully hereinafter.

In the position according to FIG. 1, the lateral support arms 20 and 21are in their center rest position and by means of the teeth 31 are inengagement with the apertures 29 in the lateral walls of the supportmember 12.

If, for example, as a result of a twisting fall, a force P (FIG. 1)occurs, which seeks to pivot laterally the boot and therewith thelateral support arm 20, then the support arm supports itself in thepoint A by means of the tooth 31 at the lateral wall 15 of the supportmember 12 which serves as roll-off part. The support arm 20 is therebyguided by means of the arcuately shaped slot 22 on the guide pin 19fixedly arranged in the support structure 12. As a result thereof theabutment pin 34 moves along a circular are about the point A inthedirection of arrow y, which by reason of the simultaneous support ofthe other spring end 47 at the abutment pin 35 is possibly only bydeformation of the bent-out end 46 of the spring. Depending on theadjustment of the spring stress by displacement of the fork 38 in thedirection of arrow x x a controllable detent resistance is exerted bythe detent spring 36 against the pivoting of the support arm 20 in thedirection of arrow y..-By a corresponding selection of the bent portion48 (or 49 during the deflection of the support arm 21) thecharacteristics for the detent resistance can be further varied, forexample, in such a manner that at first the detent resistance increasesup to a maximum resistance and after a certain pivot stroke of thesupport arm is again decreased.

In a predetermined pivot position, approximately corresponding to FIG.6, the tooth 32 engages into the aperture 30 whereby the lateral supportarm 20 is now supported in the point B at the tooth 32. The abutment pin34 has preferably already exceeded in this case the maximum bent-outportion of the spring end 46 at the place 48 and can now move outwardlyin the direction of arrow 1 against a reduced spring resistance and witha reduced radius of curvature of its movement. The support arm 20carries out a corresponding pivot movement in that it moves rapidly awayfrom the boot in the forward direction and thereby releases the boot.The maximum pivot stroke is limited, for example, by the end wall 22a(FIG. 1) of the curved guide slot 22.

A somewhat different embodiment is illustrated in FIG. 7 and 8. Itdiffers from the described embodiment essentially only in that the guidesurface and guide pin for the lateral support arms are arranged inkinematic reversal. The guide pins 119 are, in this case, connectedsecurely with the lateral support arms 20 and 21 whereas in lieu of thearcuately shaped guide slots 22, inner walls 122 are arranged at thesupport member 15 along which the guide pins may slide.

For limiting the pivot stroke, the wall 122 terminates in a cross wall122a against which the pin 119 abuts in the end position 119. As to therest, the operation of the mechanism according to FIGS. 7 and 8 is thesame as in the case of the embodiment of FIG. 1 to 6.

While I have shown and described two embodiments in accordance with thepresent invention, it is understood that the same is not limited theretobut is susceptible of numerous changes and modifications as known tothose skilled in the art, and I therefore do not wish to be limited tothe details shown and described herein but intend to cover all suchchanges and modifications as are encompassed by the scope of theappended claims.

What I claim is:

l. A ski boot support mechanism for safety ski bindings comprising:

a support structure attachable to a ski surface,

at least one boot sole holding means,

lateral support arm means attached to and movable with each of said bootsole holding means,

pivot support means for supporting each of said lateral support armmeans at said support structure for pivotal movement about a support armpivot axis which extends at least approximately perpendicular to saidski surface,

and resilient means for resiliently resisting pivotal movement of saidlateral support means, said pivot support means including roll-off meansfor accommodating predetermined movement of each of said support armpivot axes during pivotal move ment of said lateral support arm means,characterized in that said pivot support means includes means forassuring that each of the pivot axes are displaced rearwardly in thecourse of the outward pivoting stroke of the support arm means. 2. Asupport mechanism according to claim 1, wherein said support mechanismis a front support mechanism with said boot sole holding means includingtoe hold-down means, characterized in that said pivot support meansincludes means for assuring that the radii of curvature-of the pivotmovememts decrease in the course of the outward pivot stroke of thesupport arm means.

3. A ski boot support mechanism for safety ski-bindings comprising:

a support structure attachable to a ski surface,

at least one boot sole holding means,

lateral support arm means attached to and movable with each of said bootsole holding means,

pivot support means for supporting each of said lateral support armmeans at said support structure for pivotal movement about a support armpivot axis which extends atleast approximately perpendicular to said skisurface, i

and resilient means for resiliently resisting pivotal movement of saidlateral support arm means,

said pivot support means including roll-off means for accommodatingpredetermined movement of each of said support armpivot axes duringpivotal movement of said lateral support arm means, characterized inthat pivot support means includes means for assuring that the radii ofcurvature of the pivot movements decrease in the course of the outwardpivot stroke of the support arm means.

4. A support mechanism according. to claim 3, wherein said supportmechanism is a front support mechanism withsaid boot sole holding meansincluding toe hold-down means, characterized in that the support armmeans and roll-off means are in engagement with each other by toothedmeans. i

5. A front support mechanism. according to claim 4, characterized inthat thetoothed means include two teeth mutually offset in the skilongitudinal direction.

6. A front support mechanism according to claim 5, characterizedin thatthe lateral support arm means include said teeth, by means of which theyengage in aperture means provided in the support structure.

' 7.- A front support mechanism according to claim 6, characterized inthat the teeth are rounded-off approximately circularly shaped. v

A front, supportmechanism according to claim 6, characterized in thatthe lateral support arm means support themselves rolling-off at an outerwall of the support structure serving as roll-off means from the insidethereof. h

9..A front support mechanism according to claim 8, characterized in thatthe lateral support arm means are guided against lifting off from theroll-off means in rolloff contact with the lateral support arm means.

10. A frontsupport mechanism according to claim 9, characterized in thatpin means guided along arcuately shaped surface means are provided forthe guidance of the lateral support :arm means.

11. A front support mechanism according to claim 10, characterized inthatsaid pin means are guided in arcuately shaped guide slot means.

12. A front support mechanism according to claim 10, characterized inthat said means are guided on arcuately shaped guide surface means.

13. A front support mechanism according to claim 10, characterized inthat the guide surface means are arranged in the lateral support armmeans and the pin means at the structural part.

14. A front support mechanism according to claim 9,

characterized in thatfor purposes of guidance the pin means are arrangedat the lateral support arm. means port structure. 5,

15. A from support mechanism according.

a m. 14, characterized in that the guide ,pi n .means,are ar-.,.

ranged in the center point of curvature of the toothed means rolling-offat the support structure in the rest condition of the lateral supportarm means. 7

16. A front support mechanism according to claim 9, characterized inthat guide pin means are arranged in the center point of curvature ofthe toothed means rolling-off at the support structure in the restcondition of the lateral support arm means.

17. A front support mechanism according to claim 9, characterized inthat the lateral support arm means include two plate-shaped membersarranged one above the other at a distance whichrare connected with eachother by at least one of the two parts consisting of wall means andguide pin means and which carry the toothed means enabling the roll-offmovement of the support arm means.

18. A from support mechanism according to claim 17, characterized inthat the two plate shaped members are connected with each other by saidwall means and by said guide pin means for the support arm means.

19. A front support mechanism according to claim 17, characterized inthat the roll-off movement of the lateral support arm means is limitedby abutment means.

20. A front support mechanism according to claim 19, characterized inthat abutment means are arranged at the ends of the guide surface means.

21.. A front .support mechanism according to claim 20, characterized inthat the abutment means are formed by transversely extending wall partsdelimiting the guide surface means.

22. A front support mechanism according to claim 20, characterized inthat a spring means is provided for carrying out the resilient detenteffect, said spring means having ends which are spread apart on bothsides and so abut against abutment members provided at the lateralsupport arm means that during a lateral pivoting of the support armmeans the spring means is additionally stressed.

23. A front support mechanism according to claim 22, characterized inthat the spring means is a coil spring. f

24. A front support mechanism according to claim 22, characterized inthat the spring means is a spiral spring.

25. A front support mechanism according to claim 22, characterized inthat the "ends of the spring means are bent out in relation to thepivotaxes of the respectively associated lateral support arm means in such amanner that with a lateral pivoting of the support arm means the springmeans is at first additionally stressed and thereafter is againunstressed.

26. A front support mechanism according to claim 25, characterized inthat the spring means is arranged on an adjustable pin adjustable in theski longitudinal direction anddisposed essentially perpendicularly tothe ski surface;

27. A front support mechanism according to claim 26, characterized inthat the axis of the pin carrying the spring means extends between thelateral support arm means'and in that said pin is flattened off on bothsides thereof between the lateral support arm means.

28.. A front support mechanism according to claim 27, characterized inthat the pin is flattened off on-both sidesbetween the plate shapedmembers forming the support arm means. A

29. A front support mechanism according to claim 27, characterized inthat the pin is supported in a fork guided within slots of the supportstructure, said fork being longitudinally adjustably mounted.

30. A front support mechanism according to claim 29, characterized inthat said fork is longitudinally adjustably arranged in an end wall ofthe support structure.

31. A front support mechanism according to claim 29, characterized inthat the adjustable pin is constructed as indicating element for thespring tension.

32. A front support mechanism according to claim 31, characterized inthat a flattened off end of the pin is constructed as indicating elementfor the spring tension.

33. A front support mechanism according to claim 29, characterized inthat in addition to the lateral support arm means, a central adjustableabutment means is provided for the support of the front portion of a skiboot.

34. A front support mechanism according to claim 33, characterized inthat the lateral support arm means project through apertures of thehousing-shaped support structure and in that a threaded member arrangedin a center web between the aperture means is provided as centeradjustable abutment means for the front portion of the ski boot.

35. A ski boot support mechanism for safety ski bindings comprising:

a support structure attachable to a ski surface,

at least one boot sole holding means,

lateral support arm means attached to and movable with each of said bootsole holding means,

pivot support means for supporting each of said lateral support armmeans at said support structure for pivotal movement about a support armpivot axis which extends at least approximately perpendicular to saidski surface,

and resilient means for resiliently resisting pivotal movement of saidlateral support arm means, said pivot support means including roll-offmeans for accommodating predetermined movement of each of said supportarm pivot axes during pivotal movement of said lateral support armmeans,

characterized in that the support arm means and rolloff means are inengagement with each other by toothed means.

36. A support mechanism according to claim 35, wherein said supportmechanism is a front support mechanism with said boot sole holding meansincluding toe hold-down means, characterized in that the toothed meansinclude two teeth mutually offset in the ski longitudinal direction.

37. A ski boot support mechanism for safety ski bindings comprising:

a support structure attachable to a ski surface,

at least one boot sole holding means,

lateral support arm means attached to and movable with each of said bootsole holding means,

pivot support means for supporting each of said lateral support armmeans at said support structure for pivotal movement about a support armpivot axis which extends at least approximately perpendicular to saidski surface,

and resilient means for resiliently resisting pivotal movement of saidlateral support arm means,

said pivot support means including roll-off means for accommodatingpredetermined movement of each of said support arm pivot axes duringpivotal movement of said lateral support arm means,

characterized in that the lateral support arm means includes teeth, bymeans of which they engage in aperture means provided in the supportstructure.

38. A support mechanism according to claim 37, wherein said supportmechanism is a front support mechanism with said boot sole holding meansincluding toe hold-down means, characterized in that the teeth arerounded-off approximately circularly shaped.

39. A ski boot support mechanism for safety ski bindings comprising:

a support structure attachable to a ski surface,

at least one boot sole holding means,

lateral support arm means attached to and movable with each of said bootsole holding means,

pivot support means for supporting each of said lateral support armmeans at said support structure for pivotal movement about a support armpivot axis which extends at least approximately perpendicular to saidski surface,

and resilient means for resiliently resisting pivotal movement of saidlateral support arm means,

said pivot support means including roll-off means for accommodatingpredetermined movement of each of said support arm pivot axes duringpivotal movement of said lateral support arm means,

characterized in that the lateral support arm means support themselvesrolling-off at an outer wall of the support structure serving asroll-off means from the inside thereof.

40. A support mechanism according to claim 39, wherein said supportmechanism is a front support mechanism with said boot sole holding meansincluding toe hold-down means.

41. A ski boot support mechanism for safety ski bindings comprising:

a support structure attachable to a ski surface,

a pair of boot sole holding means,

a pair of lateral support arms attached one each to and movable withrespective ones of said boot sole holding means,

pivot support means for supporting each of said lateral support arms atsaid support structure for pivotal movement about respective support armpivot axes which extend at least approximately perpendicular to said skisurface,

and resilient means for resiliently resisting pivotal movement of saidlateral support arms,

wherein said resilient means includes spring means having a central axisdisposed intermediate to and substantially parallel with said supportingarm pivot axes, and wherein opposite end portions of the spring abutrespective portions of the two lateral support arms.

42. A support mechanism according to claim 41, wherein said supportmechanism is a front support mechanism with said boot sole holding meansincluding toe hold-down means, characterized in that the spring means isa coil spring with the coil thereof surrounding said central axis.

43.'A support mechanism according to claim 41, wherein said supportmechanism is a front s'uppl'ort mechanism with said boot sole holdingmeans including toe hold-down means, characterized in that the ends ofthe spring means are bent out in relation to the pivot axes of therespectively associated lateral support arm means in such a manner thatwith a lateral pivoting of the support arm means the spring means is atfirst additionally stressed and thereupon is again unstressed.

44. A support mechanism according to claim 41, wherein said supportmechanism is a front support mechanism with said boot sole holding meansincluding toe hold-down means, characterized in that the spring means isarranged on an adjustable pin adjustable in the ski longitudinaldirection and disposed essentially perpendicularly to the ski surface.

45. A from support mechanism according to claim 44, characterized inthat the axis of the pin carrying the spring means extends between thelateral support arm means and in that said pin is flattened off on bothsides thereof between the lateral support arm means.

46. A front support mechanism according to claim 45, characterized inthat the pin is flattened off on both sides between plate shaped membersforming the support arm means.

47. A front support mechanism according to claim 44, characterized inthat the pin is supported in a fork guided within slots of the supportstructure, said fork being longitudinally adjustably mounted.

48. A from support mechanism according to claim 47, characterized inthat said fork is longitudinally adjustably arranged in an end wall ofthe support structure.

49. A front support mechanism according to claim 44, characterized inthat the adjustable pin is constructed as indicating element for thespring tension.

50. A support mechanism in accordance with claim 41, wherein said springmeans are arranged on an adjustable pin adjusted upon the skilongitudinal direction and disposed essentially perpendicularly to theski surface.

51. A ski boot support mechanism for safety ski bindings comprising:

a support structure attachable to a ski surface,

a pair of boot sole holding means,

a pair of lateral support arms attached one each to and movable withrespective ones of said boot sole holding means,

pivot support means for supporting each of said lateral support arms atsaid support structure for pivotal movement about respective support armpivot axes which extend at least approximately perpendicular to said skisurface,

and resilient means for resiliently resisting pivotal movement of saidlateral support arms,

wherein said resilient means includes spring means having the endsthereof bent out in relation to the pivot axes of the respectivelyassociated lateral support arms in such a manner that with a lateralpivoting of the support arms the spring means is at first additionallystressed and thereafter is again unstressed.

52. A ski boot supporting mechanism for safety ski bindings comprising:

a support structure attachable to a ski surface,

a pair of boot sole holding means,

a pair of lateral support arms attached one each to and movable withrespective ones of said boot sole holding means,

pivot support means for supporting each of said lateral support arms atsaid support structurefor pivotal movement about respective support armpivot axes which extend at least approximately perpendicular to said skisurface,

and resilient means for resiliently resisting pivotal movement of saidlateral support arms,

wherein said support means includes guide means for accommodatingmovement of the respective support arm pivot axes in a longitudinaldirection along the respective support arm during pivoting of therespective support arm.

53. A support mechanism according to claim 52, wherein said pivotsupport means includes means for supporting said lateral support armsfor pivotal movement independently of one another.

54. A support mechanism according to claim 52, wherein said supportmechanism is a front support mechanism with said boot sole holding meansincluding toe hold-down means.

55. A support mechanism according to claim 54, characterized in thatsaid guide means includes roll-off means fixed at the support structure.

56. A front support mechanism according to claim 54, characterized inthat the lateral support arm means are guided against lifting off fromthe roll-off means in roll-off contact with the lateral support armmeans.

57. A front support mechanism according to claim 54, characterized inthat pin means guided along arcuately shaped guide surface means areprovided for the guidance of the lateral support arm means.

58. A front support mechanism according to claim 57, characterized inthat said pin means are guided in arcuately shaped guide slot means.

59. A front support mechanism according to claim 58, characterized inthat the guide surface means are arranged in the lateral support armmeans and the pin means at the structural part.

60. A front support mechanism according to claim 58, characterized inthat for purposes of guidance the pin means are arranged at the lateralsupport arm means and the guide surface means as inner walls at thesupport structure.

61. A front support mechanism according to claim 57, characterized inthat the guide pin means are arranged in the center point of curvatureof toothed means rolling-off at the support structure in the restcondition of the lateral support arm means.

62. A front support mechanism according to claim 54, characterized inthat the roll-off movement of the lateral support arm means is limitedby abutment means.

63. A front support mechanism according to claim 62, characterized inthat the abutment means are arranged at the ends of the guide surfacemeans.

64. A front support mechanism according to claim 63, characterized inthat the abutment means are formed by transversely extending wall partsdelimiting the guide surface means.

65. A front support mechanism according to claim 54, characterized inthat in addition to the lateral support arm means, a central adjustableabutment means is provided for the support of the front portion of a skiboot.

66. A front support mechanism according to claim 54, wherein said guidemeans includes toothed means at said support structure, which toothedmeans are engageable with respective ones of said support arms duringpivotal movement thereof,

67. A front support mechanism according to claim 66, characterized inthat the toothed means include two teeth mutually offset in the skilongitudinal direction.

68. A front support mechanism according to claim 67, characterized inthat the lateral support arm means include said teeth, by means of whichthey engage in aperture means provided in the support structure.

69. A front support mechanism according to claim 68, characterized inthat the lateral support arm means support themselves rolling-off at anouter wall of the support structure serving as roll-off means from theinside thereof. 7

70. A front support mechanism according to claim 69, characterized inthat the lateral support arm means are guided against lifting off fromthe roll-off means in roll-off contact with the lateral support armmeans.

71. A front support mechanism according to claim 70, characterized inthat for purposes of guidance the pin means are arranged at the lateralsupport arm means and the guide surface means as inner walls at thesupport structure.

72. A front support mechanism according to claim 71, characterized inthat the guide pin means are arranged in the center point of curvatureof the toothed means rolling-off at the support structure in the restcondition of the lateral support arm means.

73. A ski boot support mechanism for safety ski bindings comprising:

a support structure attachable to a ski surface,

at least one boot sole holding means,

lateral support arm means attached to and movable with each of said bootsole holding means,

pivot support means for supporting each of said lateral support armmeans at said support structure for pivotal movement about a support armpivot axis which extends at least approximately perpendicular to saidski surface,

and resilient means for resiliently resisting pivotal movement of saidlateral support arm means,

said pivot support means including roll-off means for accommodatingpredetermined movement of each of said support arm pivot axes duringpivotal movement of said lateral support arm means, characterized inthat the lateral support arm means project through apertures of thehousing-shaped support structure and in that a threaded member arrangedin a center web between the aperture means is provided as centeradjustable abutment means for the front'portion of the ski boot. 74. Aski boot support mechanism for safety ski bindings comprising:

a support structure attachable to a ski surface, at least one boot soleholding means, lateral support arm means attached to and movable witheach of said boot sole holding means, pivot support means for supportingeach of said lateral support arm means at said support structure forpivotal movement about a support arm pivot axis which extends at leastapproximately perpendicular to said ski surface, and resilient means forresiliently resisting pivotal movement of said lateral support armmeans, said pivot support means including roll-off means foraccommodating predetermined movement of each of said support arm pivotaxes during pivotal movement of said lateral support arm means,characterized in that the lateral support arm means include twoplate-shaped members arranged one above the other at a distance whichare connected with each other by at least one of the two partsconsisting of wall means and guide pin means and which carry toothedmeans enabling the roll-off movement of the support arm means. 75. Asupport mechanism according to claim 74, wherein said support mechanismis a front support mechanism with said boot sole holding means includingtoe hold-down means.

1. A ski boot support mechanism for safety ski bindings comprising: asupport structure attachable to a ski surface, at least one boot soleholding means, lateral support arm means attached to and movable witheach of said boot sole holding means, pivot support means for supportingeach of said lateral support arm means at said support structure forpivotal movement about a support arm pivot axis which extends at leastapproximately perpendicular to said ski surface, and resilient means forresiliently resisting pivotal movement of said lateral support means,said pivot support means including roll-off means for accommodatingpredetermined movement of each of said support arm pivot axes duringpivotal movement of said lateral support arm means, characterized inthat said pivot support means includes means for assuring that each ofthe pivot axes are displaced rearwardly in the course of the outwardpivoting stroke of the support arm means.
 2. A support mechanismaccording to claim 1, wherein said support mechanism is a front supportmechanism with said boot sole holding means including toe hold-downmeans, characterized in that said pivot support means includes means forassuring that the radii of curvature of the pivot movememts decrease inthe course of the outward pivot stroke of the support arm means.
 3. Aski boot support mechanism for safety ski bindings comprising: a supportstructure attachable to a ski surface, at least one boot sole holdingmeans, lateral support arm means attached to and movable with each ofsaid boot sole holding means, pivot support means for supporting each ofsaid lateral support arm means at said support structure for pivotalmovement about a support arm pivot axis which extends at leastapproximately perpendicular to said ski surface, and resilient means forresiliently resisting pivotal movement of said lateral support armmeans, said pivot support means including roll-off means foraccommodating predetermined movement of each of said support arm pivotaxes during pivotal movement of said lateral support arm means,characterized in that pivot support means includes means for assuringthat the radii of curvature of the pivot movements decrease in thecourse of the outward pivot stroke of the support arm means.
 4. Asupport mechanism according to claim 3, wherein said support mechanismis a front support mechanism with said boot sole holding means includingtoe hold-down means, characterized in that the support arm means androll-off means are in engagement with each other by toothed means.
 5. Afront support mechanism according to claim 4, characterized in that thetoothed means Include two teeth mutually offset in the ski longitudinaldirection.
 6. A front support mechanism according to claim 5,characterized in that the lateral support arm means include said teeth,by means of which they engage in aperture means provided in the supportstructure.
 7. A front support mechanism according to claim 6,characterized in that the teeth are rounded-off approximately circularlyshaped.
 8. A front support mechanism according to claim 6, characterizedin that the lateral support arm means support themselves rolling-off atan outer wall of the support structure serving as roll-off means fromthe inside thereof.
 9. A front support mechanism according to claim 8,characterized in that the lateral support arm means are guided againstlifting off from the roll-off means in roll-off contact with the lateralsupport arm means.
 10. A front support mechanism according to claim 9,characterized in that pin means guided along arcuately shaped surfacemeans are provided for the guidance of the lateral support arm means.11. A front support mechanism according to claim 10, characterized inthat said pin means are guided in arcuately shaped guide slot means. 12.A front support mechanism according to claim 10, characterized in thatsaid means are guided on arcuately shaped guide surface means.
 13. Afront support mechanism according to claim 10, characterized in that theguide surface means are arranged in the lateral support arm means andthe pin means at the structural part.
 14. A front support mechanismaccording to claim 9, characterized in that for purposes of guidance thepin means are arranged at the lateral support arm means and the guidesurface means as inner walls at the support structure.
 15. A frontsupport mechanism according to claim 14, characterized in that the guidepin means are arranged in the center point of curvature of the toothedmeans rolling-off at the support structure in the rest condition of thelateral support arm means.
 16. A front support mechanism according toclaim 9, characterized in that guide pin means are arranged in thecenter point of curvature of the toothed means rolling-off at thesupport structure in the rest condition of the lateral support armmeans.
 17. A front support mechanism according to claim 9, characterizedin that the lateral support arm means include two plate-shaped membersarranged one above the other at a distance which are connected with eachother by at least one of the two parts consisting of wall means andguide pin means and which carry the toothed means enabling the roll-offmovement of the support arm means.
 18. A front support mechanismaccording to claim 17, characterized in that the two plate shapedmembers are connected with each other by said wall means and by saidguide pin means for the support arm means.
 19. A front support mechanismaccording to claim 17, characterized in that the roll-off movement ofthe lateral support arm means is limited by abutment means.
 20. A frontsupport mechanism according to claim 19, characterized in that abutmentmeans are arranged at the ends of the guide surface means.
 21. A frontsupport mechanism according to claim 20, characterized in that theabutment means are formed by transversely extending wall partsdelimiting the guide surface means.
 22. A front support mechanismaccording to claim 20, characterized in that a spring means is providedfor carrying out the resilient detent effect, said spring means havingends which are spread apart on both sides and so abut against abutmentmembers provided at the lateral support arm means that during a lateralpivoting of the support arm means the spring means is additionallystressed.
 23. A front support mechanism according to claim 22,characterized in that the spring means is a coil spring.
 24. A frontsupport mechanism according to claim 22, characterized in that thespring means is a spiral spring.
 25. A front support mechanism accordingto claim 22, characterized in That the ends of the spring means are bentout in relation to the pivot axes of the respectively associated lateralsupport arm means in such a manner that with a lateral pivoting of thesupport arm means the spring means is at first additionally stressed andthereafter is again unstressed.
 26. A front support mechanism accordingto claim 25, characterized in that the spring means is arranged on anadjustable pin adjustable in the ski longitudinal direction and disposedessentially perpendicularly to the ski surface.
 27. A front supportmechanism according to claim 26, characterized in that the axis of thepin carrying the spring means extends between the lateral support armmeans and in that said pin is flattened off on both sides thereofbetween the lateral support arm means.
 28. A front support mechanismaccording to claim 27, characterized in that the pin is flattened off onboth sides between the plate shaped members forming the support armmeans.
 29. A front support mechanism according to claim 27,characterized in that the pin is supported in a fork guided within slotsof the support structure, said fork being longitudinally adjustablymounted.
 30. A front support mechanism according to claim 29,characterized in that said fork is longitudinally adjustably arranged inan end wall of the support structure.
 31. A front support mechanismaccording to claim 29, characterized in that the adjustable pin isconstructed as indicating element for the spring tension.
 32. A frontsupport mechanism according to claim 31, characterized in that aflattened off end of the pin is constructed as indicating element forthe spring tension.
 33. A front support mechanism according to claim 29,characterized in that in addition to the lateral support arm means, acentral adjustable abutment means is provided for the support of thefront portion of a ski boot.
 34. A front support mechanism according toclaim 33, characterized in that the lateral support arm means projectthrough apertures of the housing-shaped support structure and in that athreaded member arranged in a center web between the aperture means isprovided as center adjustable abutment means for the front portion ofthe ski boot.
 35. A ski boot support mechanism for safety ski bindingscomprising: a support structure attachable to a ski surface, at leastone boot sole holding means, lateral support arm means attached to andmovable with each of said boot sole holding means, pivot support meansfor supporting each of said lateral support arm means at said supportstructure for pivotal movement about a support arm pivot axis whichextends at least approximately perpendicular to said ski surface, andresilient means for resiliently resisting pivotal movement of saidlateral support arm means, said pivot support means including roll-offmeans for accommodating predetermined movement of each of said supportarm pivot axes during pivotal movement of said lateral support armmeans, characterized in that the support arm means and roll-off meansare in engagement with each other by toothed means.
 36. A supportmechanism according to claim 35, wherein said support mechanism is afront support mechanism with said boot sole holding means including toehold-down means, characterized in that the toothed means include twoteeth mutually offset in the ski longitudinal direction.
 37. A ski bootsupport mechanism for safety ski bindings comprising: a supportstructure attachable to a ski surface, at least one boot sole holdingmeans, lateral support arm means attached to and movable with each ofsaid boot sole holding means, pivot support means for supporting each ofsaid lateral support arm means at said support structure for pivotalmovement about a support arm pivot axis which extends at leastapproximately perpendicular to said ski surface, and resilient means forresiliently resisting pivotal movement of said lateral support armmeAns, said pivot support means including roll-off means foraccommodating predetermined movement of each of said support arm pivotaxes during pivotal movement of said lateral support arm means,characterized in that the lateral support arm means includes teeth, bymeans of which they engage in aperture means provided in the supportstructure.
 38. A support mechanism according to claim 37, wherein saidsupport mechanism is a front support mechanism with said boot soleholding means including toe hold-down means, characterized in that theteeth are rounded-off approximately circularly shaped.
 39. A ski bootsupport mechanism for safety ski bindings comprising: a supportstructure attachable to a ski surface, at least one boot sole holdingmeans, lateral support arm means attached to and movable with each ofsaid boot sole holding means, pivot support means for supporting each ofsaid lateral support arm means at said support structure for pivotalmovement about a support arm pivot axis which extends at leastapproximately perpendicular to said ski surface, and resilient means forresiliently resisting pivotal movement of said lateral support armmeans, said pivot support means including roll-off means foraccommodating predetermined movement of each of said support arm pivotaxes during pivotal movement of said lateral support arm means,characterized in that the lateral support arm means support themselvesrolling-off at an outer wall of the support structure serving asroll-off means from the inside thereof.
 40. A support mechanismaccording to claim 39, wherein said support mechanism is a front supportmechanism with said boot sole holding means including toe hold-downmeans.
 41. A ski boot support mechanism for safety ski bindingscomprising: a support structure attachable to a ski surface, a pair ofboot sole holding means, a pair of lateral support arms attached oneeach to and movable with respective ones of said boot sole holdingmeans, pivot support means for supporting each of said lateral supportarms at said support structure for pivotal movement about respectivesupport arm pivot axes which extend at least approximately perpendicularto said ski surface, and resilient means for resiliently resistingpivotal movement of said lateral support arms, wherein said resilientmeans includes spring means having a central axis disposed intermediateto and substantially parallel with said supporting arm pivot axes, andwherein opposite end portions of the spring abut respective portions ofthe two lateral support arms.
 42. A support mechanism according to claim41, wherein said support mechanism is a front support mechanism withsaid boot sole holding means including toe hold-down means,characterized in that the spring means is a coil spring with the coilthereof surrounding said central axis.
 43. A support mechanism accordingto claim 41, wherein said support mechanism is a front support mechanismwith said boot sole holding means including toe hold-down means,characterized in that the ends of the spring means are bent out inrelation to the pivot axes of the respectively associated lateralsupport arm means in such a manner that with a lateral pivoting of thesupport arm means the spring means is at first additionally stressed andthereupon is again unstressed.
 44. A support mechanism according toclaim 41, wherein said support mechanism is a front support mechanismwith said boot sole holding means including toe hold-down means,characterized in that the spring means is arranged on an adjustable pinadjustable in the ski longitudinal direction and disposed essentiallyperpendicularly to the ski surface.
 45. A front support mechanismaccording to claim 44, characterized in that the axis of the pincarrying the spring means extends between the lateral support arm meansand in that said pin is flattened off on both sides thereof between thelateral support arm mEans.
 46. A front support mechanism according toclaim 45, characterized in that the pin is flattened off on both sidesbetween plate shaped members forming the support arm means.
 47. A frontsupport mechanism according to claim 44, characterized in that the pinis supported in a fork guided within slots of the support structure,said fork being longitudinally adjustably mounted.
 48. A front supportmechanism according to claim 47, characterized in that said fork islongitudinally adjustably arranged in an end wall of the supportstructure.
 49. A front support mechanism according to claim 44,characterized in that the adjustable pin is constructed as indicatingelement for the spring tension.
 50. A support mechanism in accordancewith claim 41, wherein said spring means are arranged on an adjustablepin adjusted upon the ski longitudinal direction and disposedessentially perpendicularly to the ski surface.
 51. A ski boot supportmechanism for safety ski bindings comprising: a support structureattachable to a ski surface, a pair of boot sole holding means, a pairof lateral support arms attached one each to and movable with respectiveones of said boot sole holding means, pivot support means for supportingeach of said lateral support arms at said support structure for pivotalmovement about respective support arm pivot axes which extend at leastapproximately perpendicular to said ski surface, and resilient means forresiliently resisting pivotal movement of said lateral support arms,wherein said resilient means includes spring means having the endsthereof bent out in relation to the pivot axes of the respectivelyassociated lateral support arms in such a manner that with a lateralpivoting of the support arms the spring means is at first additionallystressed and thereafter is again unstressed.
 52. A ski boot supportingmechanism for safety ski bindings comprising: a support structureattachable to a ski surface, a pair of boot sole holding means, a pairof lateral support arms attached one each to and movable with respectiveones of said boot sole holding means, pivot support means for supportingeach of said lateral support arms at said support structure for pivotalmovement about respective support arm pivot axes which extend at leastapproximately perpendicular to said ski surface, and resilient means forresiliently resisting pivotal movement of said lateral support arms,wherein said support means includes guide means for accommodatingmovement of the respective support arm pivot axes in a longitudinaldirection along the respective support arm during pivoting of therespective support arm.
 53. A support mechanism according to claim 52,wherein said pivot support means includes means for supporting saidlateral support arms for pivotal movement independently of one another.54. A support mechanism according to claim 52, wherein said supportmechanism is a front support mechanism with said boot sole holding meansincluding toe hold-down means.
 55. A support mechanism according toclaim 54, characterized in that said guide means includes roll-off meansfixed at the support structure.
 56. A front support mechanism accordingto claim 54, characterized in that the lateral support arm means areguided against lifting off from the roll-off means in roll-off contactwith the lateral support arm means.
 57. A front support mechanismaccording to claim 54, characterized in that pin means guided alongarcuately shaped guide surface means are provided for the guidance ofthe lateral support arm means.
 58. A front support mechanism accordingto claim 57, characterized in that said pin means are guided inarcuately shaped guide slot means.
 59. A front support mechanismaccording to claim 58, characterized in that the guide surface means arearranged in the lateral support arm means and the pin means at thestructural part.
 60. A front support mechanism according to claim 58,characterized in that for purposes of guidance the pin means arearranged at the lateral support arm means and the guide surface means asinner walls at the support structure.
 61. A front support mechanismaccording to claim 57, characterized in that the guide pin means arearranged in the center point of curvature of toothed means rolling-offat the support structure in the rest condition of the lateral supportarm means.
 62. A front support mechanism according to claim 54,characterized in that the roll-off movement of the lateral support armmeans is limited by abutment means.
 63. A front support mechanismaccording to claim 62, characterized in that the abutment means arearranged at the ends of the guide surface means.
 64. A front supportmechanism according to claim 63, characterized in that the abutmentmeans are formed by transversely extending wall parts delimiting theguide surface means.
 65. A front support mechanism according to claim54, characterized in that in addition to the lateral support arm means,a central adjustable abutment means is provided for the support of thefront portion of a ski boot.
 66. A front support mechanism according toclaim 54, wherein said guide means includes toothed means at saidsupport structure, which toothed means are engageable with respectiveones of said support arms during pivotal movement thereof,
 67. A frontsupport mechanism according to claim 66, characterized in that thetoothed means include two teeth mutually offset in the ski longitudinaldirection.
 68. A front support mechanism according to claim 67,characterized in that the lateral support arm means include said teeth,by means of which they engage in aperture means provided in the supportstructure.
 69. A front support mechanism according to claim 68,characterized in that the lateral support arm means support themselvesrolling-off at an outer wall of the support structure serving asroll-off means from the inside thereof.
 70. A front support mechanismaccording to claim 69, characterized in that the lateral support armmeans are guided against lifting off from the roll-off means in roll-offcontact with the lateral support arm means.
 71. A front supportmechanism according to claim 70, characterized in that for purposes ofguidance the pin means are arranged at the lateral support arm means andthe guide surface means as inner walls at the support structure.
 72. Afront support mechanism according to claim 71, characterized in that theguide pin means are arranged in the center point of curvature of thetoothed means rolling-off at the support structure in the rest conditionof the lateral support arm means.
 73. A ski boot support mechanism forsafety ski bindings comprising: a support structure attachable to a skisurface, at least one boot sole holding means, lateral support arm meansattached to and movable with each of said boot sole holding means, pivotsupport means for supporting each of said lateral support arm means atsaid support structure for pivotal movement about a support arm pivotaxis which extends at least approximately perpendicular to said skisurface, and resilient means for resiliently resisting pivotal movementof said lateral support arm means, said pivot support means includingroll-off means for accommodating predetermined movement of each of saidsupport arm pivot axes during pivotal movement of said lateral supportarm means, characterized in that the lateral support arm means projectthrough apertures of the housing-shaped support structure and in that athreaded member arranged in a center web between the aperture means isprovided as center adjustable abutment means for the front portion ofthe ski boot.
 74. A ski boot support mechanism for safety ski bindingscomprising: a support structure attachable to a ski surface, at leastone boot sole holding means, lateral support arm means attached to andmovable with each of said boot sole holding means, pivot support meansfor supporting each of said lateral support arm means at said supportstructure for pivotal movement about a support arm pivot axis whichextends at least approximately perpendicular to said ski surface, andresilient means for resiliently resisting pivotal movement of saidlateral support arm means, said pivot support means including roll-offmeans for accommodating predetermined movement of each of said supportarm pivot axes during pivotal movement of said lateral support armmeans, characterized in that the lateral support arm means include twoplate-shaped members arranged one above the other at a distance whichare connected with each other by at least one of the two partsconsisting of wall means and guide pin means and which carry toothedmeans enabling the roll-off movement of the support arm means.
 75. Asupport mechanism according to claim 74, wherein said support mechanismis a front support mechanism with said boot sole holding means includingtoe hold-down means.